The 2E″ state of NO3, a prototype for the Jahn-Teller effect, has been an enigma and a challenge for a long time for both experiment and theory. We present a detailed theoretical study of the vibronic quantum dynamics in this electronic state, uncovering the effects of tunnelling, geometric phase, and symmetry. To this end, 45 vibronic levels of NO3 in the 2E″ state are determined accurately and analyzed thoroughly. The computation is based on a high quality diabatic potential representation of the two-sheeted surface of the 2E″ state developed by us [W. Eisfeld et al., J. Chem. Phys. 140, 224109 (2014)] and on the multi-configuration time dependent Hartree approach. The vibrational eigenstates of the anion are determined and analyzed as well to gain a deeper understanding of the symmetry properties of such D3h symmetric systems. To this end, 61 eigenstates of the anion ground state are computed using the single sheeted potential surface of the 1A1 state published in the same reference quoted above. The assignments of both the vibrational and vibronic levels are discussed. A simple model is proposed to rationalize the computed NO3 spectrum strongly influenced by the Jahn-Teller couplings, the associated geometric phase effect, and the tunnelling. Comparison with the available spectroscopic data is also presented.
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21 January 2017
Research Article|
January 19 2017
Vibronic eigenstates and the geometric phase effect in the 2E″ state of NO3
Wolfgang Eisfeld;
Wolfgang Eisfeld
a)
1Theoretische Chemie,
Universität Bielefeld
, Postfach 100131, D-33501 Bielefeld, Germany
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Alexandra Viel
Alexandra Viel
b)
2Institut de Physique de Rennes,
CNRS and Université de Rennes 1, UMR 6251
, F-35042 Rennes, France
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Wolfgang Eisfeld
1,a)
Alexandra Viel
2,b)
1Theoretische Chemie,
Universität Bielefeld
, Postfach 100131, D-33501 Bielefeld, Germany
2Institut de Physique de Rennes,
CNRS and Université de Rennes 1, UMR 6251
, F-35042 Rennes, France
J. Chem. Phys. 146, 034303 (2017)
Article history
Received:
June 14 2016
Accepted:
December 31 2016
Citation
Wolfgang Eisfeld, Alexandra Viel; Vibronic eigenstates and the geometric phase effect in the 2E″ state of NO3. J. Chem. Phys. 21 January 2017; 146 (3): 034303. https://doi.org/10.1063/1.4973983
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